Sliding plug door driving device, sliding plug door and vehicle

Abstract

The invention relates to the field of doors or similar devices installed on the side faces of vehicles, in particular to a sliding plug door driving device, a sliding plug door and a vehicle. The sliding plug door driving device comprises a connecting seat and a door plate driving mechanism, the door plate driving mechanism comprises a door carrying frame module and a driving module, the door carrying frame module comprises a swinging guide frame and a moving seat, and a track plate for limiting an inclined track is further fixedly arranged on the connecting seat; the driving module comprises a lead screw seat, the lead screw seat is connected to the connecting seat to form an asymmetric quadrangle, a lead screw and a power device of the lead screw are mounted on the lead screw seat, and a nut connected with the moving seat is mounted on the lead screw; at the closing position of the sliding plug door, a set included angle is formed between the lead screw and the inclined track so that the nut can be locked, the lead screw rotates to drive the lead screw base to move, and when the lead screw moves to be parallel to the inclined track, the nut can drive the movable base to move. The problem that the width or the opening degree of the sliding plug door is limited due to the fact that the sliding plug door interferes with a protruding object of a vehicle body after being opened is solved.

Description

Technical Field

[0001] The present invention relates to the field of doors or similar devices installed on the side of a vehicle, and in particular to a plug-in sliding door driving device, a plug-in sliding door and a vehicle. Background Art

[0002] Sliding plug doors are commonly used in rail vehicles, construction sites, and public transportation vehicles. In public transportation, such as buses, sliding plug doors offer greater reliability and safety than inward-swinging doors, making their use on high-end buses a trend.

[0003] For buses, passenger boarding and alighting efficiency is a crucial concern. Since ample space is often available at the rear of the vehicle, conventional double-leaf sliding doors can be used as rear doors to meet this requirement. However, limited space at the front of the vehicle, in front of the front wheels, precludes the use of double-leaf sliding doors. Therefore, when using sliding doors, only single-leaf doors are acceptable.

[0004] The existing sliding door is opened and closed under the action of a driving device, which includes a connecting seat and a driving mechanism arranged on the connecting seat. The connecting seat is fixedly connected to the upper edge of the door opening. The driving mechanism is installed on the connecting seat, driving the door panel to move relative to the connecting seat to realize the sliding action of the door panel.

[0005] In the existing structure, the door panels are parallel to the vehicle body after being opened by the drive device. Therefore, when a single-leaf Sierra door is used as the front door at the front of the vehicle body, if the width of the door leaf (door panel) (in the front and rear directions of the vehicle) is too wide, then when the door is opened, the rear end of the door leaf will interfere with protrusions such as the wheel arches and mounting parts where the wheels are located. Therefore, the width or opening of the door leaf is limited, which will to a certain extent affect the efficiency of boarding and disembarking passengers. Summary of the Invention

[0006] One of the purposes of the present invention is to provide a Sierra door driving device to solve the problem of limited width or opening of the Sierra door due to interference with protrusions of the vehicle body after opening.

[0007] At the same time, the purpose of the present invention is also to provide a sliding door and a vehicle using the above-mentioned sliding door driving device.

[0008] In order to solve the above problems, the plug sliding door driving device of the present invention adopts the following technical solutions: The Sierra door driving device includes a connecting seat for connecting to the vehicle body, the connecting seat is provided with a door panel driving mechanism, the door panel driving mechanism includes a door carrying frame module and a driving module, the door carrying frame module includes a guide frame hinged to the connecting seat at one end and capable of swinging in the left and right directions, and a movable seat installed on the guide frame, and a track plate is fixedly provided on the connecting seat to limit the moving trajectory of the movable seat to an inclined trajectory inclined left and right; the driving module includes a screw seat, the two ends of the screw seat are respectively connected to the connecting seat by module connecting rods to form an asymmetric quadrilateral, so that the movement of the screw seat relative to the connecting seat is a composite movement combining swinging in the left and right directions and translation in the front and back directions, a screw and its power device are installed on the screw seat, and a nut fixedly connected to the movable seat is installed on the screw; when the Sierra door is in the closed position, the screw and the inclined trajectory have a set angle between them so that the nut is locked, and the rotation of the screw can drive the screw seat to move, and when it moves until the screw is parallel to the inclined trajectory, the nut can drive the movable seat to move.

[0009] Furthermore, the connecting seat is provided with an elongated limiting hole, the swinging end of the guide frame is provided with a roller that cooperates with the elongated limiting hole, and the swinging end of the guide frame cooperates with the connecting seat through the roller.

[0010] Furthermore, the guide frame and the connecting seat are hinged via a ball joint assembly.

[0011] Furthermore, the guide frame includes at least two parallel guide rods, adjacent ends of the guide rods are connected by end frames, and the guide frame is hinged to the connecting seat through the end frames at the corresponding ends.

[0012] Furthermore, the track plate is provided with a track hole, and the moving seat is provided with a guide head extending into the track hole, and the moving track of the moving seat is limited to the inclined track through the cooperation of the track hole and the guide head.

[0013] Furthermore, the guide head is provided with a guide wheel, and the guide head cooperates with the track hole through the guide wheel.

[0014] Furthermore, the power device is arranged above the lead screw and is transmission-connected to one end of the lead screw.

[0015] Furthermore, the power device and the lead screw are connected via a synchronous belt transmission.

[0016] Furthermore, a travel switch cooperating with the screw seat is provided on the connecting seat, and the travel switch is triggered by the screw seat to shut down the power device when the Sierra door is closed.

[0017] Furthermore, a door shaft is provided at one end of the connecting seat close to the swing end of the guide frame, and a crank arm is provided on the door shaft. The crank arm forms a four-bar linkage through an auxiliary rod configured on the movable seat. The four-bar linkage is connected to the swing end of the guide frame through a transmission rod. The swinging end of the guide frame can drive the door shaft to rotate reciprocatingly.

[0018] Furthermore, the four-bar linkage mechanism is a parallelogram mechanism.

[0019] Furthermore, the screw and nut are active and passive parts to each other, and an emergency unlocking device is also provided on the connecting seat. The emergency unlocking device includes an accumulator fixed to the connecting seat and a flexible shaft connected to the accumulator. The other end of the flexible shaft is connected to the power module of the door frame module, which is used to pull the guide frame to a position parallel to the inclined track.

[0020] Furthermore, the accumulator includes a wire joint, and the wire joint includes a wire pulling tube, and the wire pulling tube and the end of the wire are matched for one-way transmission in the direction of pulling the wire.

[0021] Furthermore, a locking link for locking the Sierra door in a closed state is provided between the module link connected to the end of the screw seat close to the swing end of the guide frame and the swing end of the guide frame.

[0022] The beneficial effects of the plug-and-slide door drive device of the present invention are an improved invention. By improving the structure and connection between the door-carrying frame module and the drive module, one end of the guide frame of the door-carrying frame module is hinged to the connecting seat. The left and right swinging of the other end of the guide frame adjusts the position of the plug-and-slide door panel, adjusting the position from parallel to the vehicle body when closed to tilted relative to the vehicle body when opened. Furthermore, by forming an asymmetric quadrilateral mechanism between the drive mechanism's lead screw seat and the connecting seat, the drive mechanism's lead screw cooperates with the nut connected to the moving seat of the door-carrying frame module and the track plate to achieve automatic swinging of the guide frame and forward and backward translation of the door panel in an inclined state. Since the door panel translates in an inclined state, if the door panel moves backward to open, the distance between its rear edge and the side of the vehicle body will increase when the door is opened. This prevents protrusions (such as fender flares and decorative parts) far from the door opening from interfering with the door opening. The only requirement is to ensure that there are no protrusions on the side of the vehicle body near the door opening (corresponding to the front edge of the door panel). Therefore, the problem of limited width or opening of the Sierra door due to interference with protrusions on the vehicle body after opening can be solved, thereby improving the efficiency of boarding and disembarking passengers on the vehicle.

[0023] The sliding plug door of the present invention adopts the following technical solutions: A plug-in door comprises a plug-in door drive device and a door panel connected to the plug-in door drive device, the plug-in door drive device comprises a connecting seat for connecting to a vehicle body, the connecting seat is provided with a door panel drive mechanism, the door panel drive mechanism comprises a door carrying frame module and a drive module, the door carrying frame module comprises a guide frame hinged to the connecting seat at one end and capable of swinging in the left and right directions, and a moving seat mounted on the guide frame, a track plate is also fixedly provided on the connecting seat for limiting the moving track of the moving seat to an inclined track inclined left and right; the drive module comprises a screw seat, The two ends of the screw seat are respectively connected to the connecting seat by modular connecting rods to form an asymmetric quadrilateral, so that the movement of the screw seat relative to the connecting seat is a composite movement combining swinging in the left and right directions and translation in the front and back directions. A screw and its power device are installed on the screw seat, and a nut fixedly connected to the moving seat is installed on the screw. When the Sierra door is in the closed position, there is a set angle between the screw and the inclined track so that the nut is locked. The rotation of the screw can drive the screw seat to move. When the screw moves until it is parallel to the inclined track, the nut can drive the moving seat to move.

[0024] Furthermore, the connecting seat is provided with an elongated limiting hole, the swinging end of the guide frame is provided with a roller that cooperates with the elongated limiting hole, and the swinging end of the guide frame cooperates with the connecting seat through the roller.

[0025] Furthermore, the guide frame and the connecting seat are hinged via a ball joint assembly.

[0026] Furthermore, the guide frame includes at least two parallel guide rods, adjacent ends of the guide rods are connected by end frames, and the guide frame is hinged to the connecting seat through the end frames at the corresponding ends.

[0027] Furthermore, the track plate is provided with a track hole, and the moving seat is provided with a guide head extending into the track hole, and the moving track of the moving seat is limited to the inclined track through the cooperation of the track hole and the guide head.

[0028] Furthermore, the guide head is provided with a guide wheel, and the guide head cooperates with the track hole through the guide wheel.

[0029] Furthermore, the power device is arranged above the lead screw and is transmission-connected to one end of the lead screw.

[0030] Furthermore, the power device and the lead screw are connected via a synchronous belt transmission.

[0031] Furthermore, a travel switch cooperating with the screw seat is provided on the connecting seat, and the travel switch is triggered by the screw seat to shut down the power device when the Sierra door is closed.

[0032] Furthermore, a door shaft is provided at one end of the connecting seat close to the swing end of the guide frame, and a crank arm is provided on the door shaft. The crank arm forms a four-bar linkage through an auxiliary rod configured on the movable seat. The four-bar linkage is connected to the swing end of the guide frame through a transmission rod. The swinging end of the guide frame can drive the door shaft to rotate reciprocatingly.

[0033] Furthermore, the four-bar linkage mechanism is a parallelogram mechanism.

[0034] Furthermore, the screw and nut are active and passive parts to each other, and an emergency unlocking device is also provided on the connecting seat. The emergency unlocking device includes an accumulator fixed to the connecting seat and a flexible shaft connected to the accumulator. The other end of the flexible shaft is connected to the power module, which is used to pull the guide frame to a position parallel to the inclined track.

[0035] Furthermore, the accumulator includes a wire joint, and the wire joint includes a wire pulling tube, and the wire pulling tube and the end of the wire are matched for one-way transmission in the direction of pulling the wire.

[0036] Furthermore, a locking link for locking the Sierra door in a closed state is provided between the module link connected to the end of the screw seat close to the swing end of the guide frame and the swing end of the guide frame.

[0037] The beneficial effects of the sliding door: The sliding door of the present invention is an improved invention. Its driving device improves the structure and connection between the door-carrying frame module and the driving module. One end of the guide frame of the door-carrying frame module is hinged to the connecting seat. The other end of the guide frame can be swung left and right to adjust the position of the sliding door panel, adjusting it from a parallel position with the vehicle body when closed to an inclined position relative to the vehicle body when open. On this basis, by forming an asymmetric quadrilateral mechanism between the drive mechanism's lead screw and connecting base, the drive mechanism's lead screw, the nut connected to the moving base of the door carrier module, and the track plate cooperate to achieve automatic swinging of the guide frame and forward and backward translation of the door panel when tilted. Because the door panel translates while tilted, assuming the door panel moves backward to open, the distance between its rear edge and the side of the vehicle body increases during opening. This prevents protrusions far from the door opening (such as fender flares and decorative parts) from interfering with door opening. The only requirement is to ensure that there are no protrusions on the side of the vehicle body near the door opening (corresponding to the front edge of the door panel). This solves the problem of limited width or opening of the sliding door due to interference with protruding bodywork after opening, thereby improving passenger boarding and disembarking efficiency.

[0038] The vehicle of the present invention adopts the following technical solutions: A vehicle, comprising a vehicle body and a Sierra door installed on the side of the vehicle body, the Sierra door comprising a Sierra door drive device and a door panel connected to the Sierra door drive device, the Sierra door drive device comprising a connecting seat for connecting to the vehicle body, the connecting seat being provided with a door panel drive mechanism, the door panel drive mechanism comprising a door carrying frame module and a drive module, the door carrying frame module comprising a guide frame having one end hinged to the connecting seat and capable of swinging in left and right directions, and a moving seat installed on the guide frame, a track plate for limiting the moving track of the moving seat to an inclined track inclined left and right is also fixedly provided on the connecting seat; The driving module includes a screw seat, both ends of which are connected to the connecting seat by module connecting rods to form an asymmetric quadrilateral, so that the movement of the screw seat relative to the connecting seat is a composite movement combining swinging in the left and right directions and translation in the front and back directions. A screw and its power device are installed on the screw seat, and a nut fixedly connected to the moving seat is installed on the screw. When the Sierra door is in the closed position, there is a set angle between the screw and the inclined trajectory so that the nut is locked. The rotation of the screw can drive the screw seat to move. When the screw moves until it is parallel to the inclined trajectory, the nut can drive the moving seat to move.

[0039] Furthermore, the connecting seat is provided with an elongated limiting hole, the swinging end of the guide frame is provided with a roller that cooperates with the elongated limiting hole, and the swinging end of the guide frame cooperates with the connecting seat through the roller.

[0040] Furthermore, the guide frame and the connecting seat are hinged via a ball joint assembly.

[0041] Furthermore, the guide frame includes at least two parallel guide rods, adjacent ends of the guide rods are connected by end frames, and the guide frame is hinged to the connecting seat through the end frames at the corresponding ends.

[0042] Furthermore, the track plate is provided with a track hole, and the moving seat is provided with a guide head extending into the track hole, and the moving track of the moving seat is limited to the inclined track through the cooperation of the track hole and the guide head.

[0043] Furthermore, the guide head is provided with a guide wheel, and the guide head cooperates with the track hole through the guide wheel.

[0044] Furthermore, the power device is arranged above the lead screw and is transmission-connected to one end of the lead screw.

[0045] Furthermore, the power device and the lead screw are connected via a synchronous belt transmission.

[0046] Furthermore, a travel switch cooperating with the screw seat is provided on the connecting seat, and the travel switch is triggered by the screw seat to shut down the power device when the Sierra door is closed.

[0047] Furthermore, a door shaft is provided at one end of the connecting seat close to the swing end of the guide frame, and a crank arm is provided on the door shaft. The crank arm forms a four-bar linkage through an auxiliary rod configured on the movable seat. The four-bar linkage is connected to the swing end of the guide frame through a transmission rod. The swinging end of the guide frame can drive the door shaft to rotate reciprocatingly.

[0048] Furthermore, the four-bar linkage mechanism is a parallelogram mechanism.

[0049] Furthermore, the screw and nut are active and passive parts to each other, and an emergency unlocking device is also provided on the connecting seat. The emergency unlocking device includes an accumulator fixed to the connecting seat and a flexible shaft connected to the accumulator. The other end of the flexible shaft is connected to the door frame module or the power module, and is used to pull the guide frame to a position parallel to the inclined track.

[0050] Furthermore, the accumulator includes a wire joint, and the wire joint includes a wire pulling tube, and the wire pulling tube and the end of the wire are matched for one-way transmission in the direction of pulling the wire.

[0051] Furthermore, a locking link for locking the Sierra door in a closed state is provided between the module link connected to the end of the screw seat close to the swing end of the guide frame and the swing end of the guide frame.

[0052] Beneficial Effects of the Vehicle: The vehicle of the present invention is an improved invention. The structure of the sliding door of the vehicle is improved. Specifically, the sliding door drive device improves the structure and connection between the door carrier module and the drive module. One end of the guide frame of the door carrier module is hinged to the connecting seat, and the other end can be swung left and right to adjust the position of the sliding door panel, that is, adjust the position from parallel to the vehicle body when closed to an inclined position relative to the vehicle body when open. On this basis, by forming an asymmetric quadrilateral mechanism between the drive mechanism's lead screw and connecting base, the drive mechanism's lead screw, the nut connected to the moving base of the door carrier module, and the track plate cooperate to achieve automatic swinging of the guide frame and forward and backward translation of the door panel when tilted. Because the door panel translates while tilted, assuming the door panel moves backward to open, the distance between its rear edge and the side of the vehicle body increases during opening. This prevents protrusions far from the door opening (such as fender flares and decorative parts) from interfering with door opening. The only requirement is to ensure that there are no protrusions on the side of the vehicle body near the door opening (corresponding to the front edge of the door panel). This solves the problem of limited width or opening of the sliding door due to interference with protruding bodywork after opening, thereby improving passenger boarding and disembarking efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1This is a schematic structural diagram of an embodiment of a sliding plug door (only a portion of the door panel is shown); Figure 2 yes Figure 1 The middle is a schematic diagram of the structure of the sliding door from another perspective; Figure 3 yes Figure 1 A schematic diagram of the structure of the connecting seat; Figure 4 yes Figure 1 Schematic diagram of the structure of the door frame module; Figure 5 yes Figure 1 Schematic diagram of the structure of the driver module; Figure 6 yes Figure 1 Schematic diagram of the structure of the wire connector; Figure 7 yes Figure 6 A cross-sectional view of the cable connector in FIG. Figure 8 yes Figure 1 An enlarged view of the structure showing the position of the locking link; Figure 9 This is a diagram of the relative positions of the locking link and the rear module link during the unlocking and locking process.

[0054] In the figure: 1. Connecting seat; 101. Flanged edge; 102. Connecting hole; 103. Front hinge seat; 104. Rear hinge seat; 105. Track plate; 106. Stop block; 107. Track hole; 108. Travel switch; 2. Door panel; 3. Drive module; 301. Screw seat; 302. Front module connecting rod; 303. Rear module connecting rod; 304. Screw; 305. Power unit; 306. Nut; 307 , synchronous belt; 4, door frame module; 401, guide frame; 402, moving seat; 403, door frame; 404, roller; 405, ball hinge assembly; 406, guide rod; 407, guide wheel; 5, door shaft; 501, crank arm; 502, auxiliary rod; 503, transmission rod; 6, accumulator; 7, flexible shaft; 701, pull wire joint; 702, pull wire; 703, pull wire traction tube; 8, locking link. DETAILED DESCRIPTION

[0055] The features and performance of the present invention are further described in detail below in conjunction with specific embodiments.

[0056] The biggest obstacle to using sliding doors as front doors on buses is that they only open rearward. The door opening is located relatively close to the front wheels in the fore-aft direction. When the door is opened, the door panel's backward movement will interfere with the front wheels. Therefore, using sliding doors as front doors on buses generally requires sacrificing door panel width or door opening. This reduction in door panel width or opening can affect passenger boarding and alighting efficiency and reduce passenger comfort. Therefore, this issue should be avoided in particular on high-end vehicles.

[0057] When parking, drivers often have ample space on the side of the vehicle to allow the doors to open outwards. Considering the causes of the aforementioned problem, if the space on the side of the vehicle can be fully utilized, allowing the front end of the sliding door panel to be positioned away from the vehicle body when opening, this problem can be effectively solved. Based on the above inventive concept, the present invention provides a sliding door drive device, a sliding door, and a vehicle.

[0058] The specific implementation of the plug sliding door drive device of the present invention is as follows: like Figure 1-7 As shown, the plug sliding door driving device of the present invention includes a connecting seat 1, the function of which is to realize the connection between the entire device and the vehicle body, specifically the side panel of the vehicle body, and at the same time serve as the installation base of the plug sliding door door panel 2. Figure 1 、 2 In the embodiment shown in Figures 3 and 4, the connector 1 is constructed as a frame. Its two ends in the fore-aft direction (corresponding to the fore-aft direction of the vehicle) can be connected to fixing brackets provided on the vehicle body during use. To achieve this connection, flanges 101 are provided at the front and rear ends of the connector 1. Flanges 101 are provided with connection holes 102, which can be fastened by inserting fasteners through these connection holes 102 to secure the connector 1.

[0059] As mentioned above, the basic function of the connecting seat 1 is to connect with the vehicle body and install other components of the drive device. Figure 3 The connecting base 1 in the illustrated embodiment utilizes a frame structure. However, in other embodiments, the connecting base 1 may also utilize a box-type structure, or other similar structures. In this case, it is sufficient to ensure that it can clear the trajectory of the moving parts. Therefore, a frame structure is not essential for the connecting base 1 to perform its basic functions. Similarly, the flange 101 and connecting hole 102 described above are not essential for achieving the connection between the connecting base 1 and the vehicle body. In other embodiments, the flange 101 may be omitted or replaced by a connecting beam fixed at the corresponding position.

[0060] exist Figure 3In the illustrated embodiment, the various parts of the connecting base 1 are connected by fastening bolts, while in other embodiments, the various parts can also be connected by welding. In addition, in order to achieve connection with the drive module 3 mentioned below, the front and rear ends of the connecting base 1 are respectively fixed with hinge seats. The hinge seat located at the front end of the connecting base 1 is referred to as the front hinge seat 103, and the hinge seat located at the rear end of the connecting base 1 is referred to as the rear hinge seat 104. The front hinge seat 103 and the rear hinge seat 104 are both cantilever structures, wherein the front hinge seat 103 cantilevers backward and the rear hinge seat 104 cantilevers forward. The hinge seat can be fixed to the connecting base 1 by fasteners such as bolts, or fixed to the connecting base 1 by welding or other methods, or can be integrally formed with the connecting base 1 by sheet metal.

[0061] To enable the door panel 2 to open and close, a door panel drive mechanism is installed on the connecting base 1. The door panel drive mechanism drives the door panel 2 of the sliding door back and forth, thereby achieving the door opening and closing action. The door panel drive mechanism mainly comprises a door carrier module 4 and a drive module 3. The door carrier module 4 is used to "carry" the door panel 2, so when in use, it is connected to the door panel 2 and defines the movement path of the door panel 2. The drive module 3 is used to provide the power for the door panel 2 to move and transmit the power to the door panel 2.

[0062] Since the present invention aims to achieve the effect of opening the door panel 2 in an inclined state, and the door panel 2 is in a posture parallel to the vehicle body side when closed, the door frame module needs to have a structure that can convert the door panel 2 between the state parallel to the vehicle side and the state inclined relative to the vehicle side. In order to form the above structure, Figure 4 As shown, the door-carrying frame module 4 includes a guide frame 401 and a movable base 402 disposed on the guide frame 401. The movable base 402 is provided with a door-carrying frame 403 for fixedly connecting to the door panel 2. The movable base 402 can directly drive the door panel 2 to move. The front end of the guide frame 401 is hinged to the front end of the connecting base 1, so that its rear end can swing in the left and right directions. In other words, the rear end of the guide frame 401 forms a swing end. When the guide frame 401 is parallel to the connecting base 1 in the front-to-back direction, the vehicle door is in a closed state, and the door panel 2 is flush with the vehicle body side. When the swing end of the guide frame 401 swings toward the outside of the vehicle, the rear end of the door panel 2 tilts outward, and the distance between the rear end and the outer side of the vehicle body will increase, forming a tilted posture. At this time, if the door panel 2 is moved backward, the distance between the rear end and the outer side of the vehicle body will increase. To prevent unwanted swinging of the movable base 402 during movement and to define a door opening and closing trajectory, a track plate 105 is fixedly mounted on the connecting base 1. The track plate 105 can define the movement trajectory of the movable base 402 as a left-right inclined trajectory. When the movable base 402 moves, it can only move along the inclined trajectory set by the track plate 105.

[0063] In the above embodiment, the Sierra door is used as the front door of the vehicle and is a single-leaf Sierra door, so the front end of the guide frame 401 is hinged to the connecting seat 1, and the rear end of the guide frame 401 is set as a swing end; in other embodiments, the Sierra door can also be a rear door located at the rear side of the vehicle body. In this case, the door panel 2 can move forward when the door is opened, or the Sierra door is a double-leaf Sierra door. In the Sierra door driving device of the present invention, one door panel driving mechanism is only used to drive one of the leaves. In this case, the door panel 2 may also move forward when it is opened. In this case, the rear end of the guide frame 401 can also be hinged to the connecting seat 1, and the front end of the guide frame 401 can be set as a swing end.

[0064] From the above description of the working principle of the door guide frame module, it can be seen that when opening the door, the rear end of the door panel 2 must first be swung outward from the vehicle body. In order to achieve the above action, the driving module 3 should have the function of driving the guide frame to swing before the moving seat 402 moves (when opening the door). Based on the above requirements, if Figure 5 As shown, the driving module 3 includes a screw seat 301. In some embodiments, the screw seat adopts a "beam + shaft seat structure", and the two ends of the screw seat 301 are respectively connected to the connecting seat 1 through module connecting rods to form an asymmetric quadrilateral, so that the movement of the screw seat 301 relative to the connecting seat 1 is a composite movement combining swinging in the left and right directions and translation in the front and back directions. Here, the module connecting rod located at the front end of the screw seat 301 is defined as the front module connecting rod 302, and the module connecting rod located at the rear end of the screw seat is defined as the rear module connecting rod 303. The front module connecting rod 302 is connected to the front articulated seat 103 on the connecting seat 1, and the rear module connecting rod 303 is connected to the rear articulated seat 104 on the connecting seat 1. The four sides of the above-mentioned asymmetric quadrilateral are respectively composed of the screw seat 301, the front module connecting rod 302, the rear module connecting rod 303 and the connecting line between the front articulated seat 103 and the rear articulated seat 104, wherein the connecting line between the front articulated seat 103 and the rear articulated seat 104 is parallel to the connecting seat 1, that is, parallel to the side of the vehicle body when in use. The compound movement of the screw seat 301 relative to the connecting seat 1 can be specifically achieved by matching the length of the screw seat 301, the length of the front module connecting rod 102 and the length of the rear module connecting rod. This should be something that a technician in this field can do, and will not be elaborated here.

[0065] A lead screw 304 and a power device 305 are mounted on the lead screw seat 301 , a nut 306 is mounted on the lead screw 304 , and the lead screw 304 and the nut 306 together constitute a lead screw and nut mechanism. When the two rotate relative to each other, one of them will inevitably undergo axial movement. When the plug door is in the closed position, the screw 304 forms a set angle with the inclined track. At this time, if the power device drives the screw 304 to rotate, the nut 306 cannot move forward or backward due to the restriction of the track plate 105. Therefore, the screw 304 will move forward by itself, driving the screw seat 301 to move synchronously. The screw seat 301 then swings under the action of the asymmetric quadrilateral formed above, driving the guide frame 401 to swing until the screw 304 is parallel to the inclined track defined by the track plate 105. At this time, the nut 306 will move backward under the action of the screw 304 and drive the moving seat 402 forward to achieve the door opening action. During this process, to ensure that the screw 304 can remain stably at the extreme position, a stopper 106 can be provided on the connecting seat 1 to stop it. When it is necessary to close the door, the screw 304 can be rotated in the opposite direction.

[0066] The process of the Sierra door driving device of the present invention driving the door panel to open is as follows: in the initial state, the screw seat 301 and the screw 304 installed thereon are parallel to the side of the vehicle body. When the door opening signal is received, the power device 305 drives the screw 304 to rotate. Since there is an angle between the guide frame 401 and the inclined track defined on the track plate 105 at this time, the movable seat 402 cannot move in the front and rear directions. Therefore, the nut 306 fixedly connected to the movable seat 402 cannot move in the front and rear directions. The screw 304 will move forward relative to the nut 306 and drive the screw seat 301 to move synchronously. During the movement of the screw seat 301, the screw seat 301 will swing in the front and rear directions due to the action of the module connecting rod. The swing is simultaneously transmitted to the movable seat 402 and the guide frame 401 through the nut 306. Therefore, the swinging end of the guide frame 401, that is, the rear end, will also swing. This swinging process will realize the adjustment of the door panel 2 from a posture parallel to the side of the vehicle body to a posture inclined relative to the side of the vehicle body, and the rear end of the door panel 2 will swing out of the side of the vehicle body. When the aforementioned swinging motion causes the guide frame 401 to be parallel to the inclined trajectory, the lead screw 304 is restrained, and the nut 306 moves rearward relative to the lead screw 304, thereby driving the movable seat 402 and the door panel 2 backward until the door is fully opened. During the rearward movement of the door panel 2, the door panel 2 maintains an inclined position relative to the vehicle body side. The rear end is further away from the vehicle body side, thus avoiding interference with protrusions on the vehicle body side. This allows for a wider door panel 2, thereby improving the door's passage efficiency.

[0067] The process of the Sierra door driving device of the present invention driving the door panel to close is opposite to the process of driving the door panel to open, and it is only necessary to flip the lead screw.

[0068] Whether the guide frame 401 can swing smoothly and reliably is an important factor in determining whether the Sierra door can be opened and closed smoothly. Therefore, efforts should be made to reduce the resistance of the guide frame 401 when it swings. In a preferred embodiment, a long strip limiting hole is provided on the connecting seat 1 at the swinging end corresponding to the guide frame 401, and a roller 404 that cooperates with the long strip limiting hole is provided at the swinging end of the guide frame 401. The swinging end of the guide frame 401 cooperates with the connecting seat 1 through the roller 404. The cooperation of the roller 404 reduces the resistance of the guide frame 401 when it swings, thereby achieving the effect of avoiding jamming.

[0069] It should be noted here that, although in the above embodiment the swinging end of the guide frame 401 and the connecting seat 1 are matched via the roller 404, the above structure is not necessary. For example, in some other embodiments, the swinging end of the guide frame 401 can also be set as a slider structure to enable the guide frame 401 and the connecting seat 1 to slide together.

[0070] In order to further prevent the guide frame 401 from getting stuck during the swinging process, the guide frame 401 and the connecting seat 1 are hinged via a ball hinge assembly 405. The ball hinge assembly 405 has a greater degree of freedom than a plane hinge, thereby preventing the guide frame 401 from getting stuck at the hinged position with the connecting seat 1 to a greater extent. Figure 4 As shown, the ball joint assembly 405 includes a cylindrical ball seat and a ball head disposed in the ball seat. The ball seat is fixedly connected to the connecting seat, and the ball head is connected to the guide frame 401. Since the swing of the guide frame 401 is mainly in the horizontal plane, although the ball joint assembly 405 is used to hinge the guide frame 401 to the connecting seat 1 in the above embodiment, in other embodiments, the ball joint assembly 405 can also be replaced by a plane hinge structure.

[0071] Since the guide frame 401 is to bear the door panel 2 and other components, it should have a certain structural strength, such as bending strength, and should be able to accurately guide the moving seat 402. Therefore, in a preferred embodiment, Figure 4 As shown, the guide frame 401 includes at least two parallel guide rods 406, and the adjacent ends of the guide rods 406 are connected by end frames. The guide frame 401 is hinged to the connecting seat 1 through the end frames at the corresponding ends. Figure 4 In the embodiment shown, the swinging end of the guide rod 406 passes through the end frame at that end, and the roller 404 of the swinging end of the guide frame is directly mounted on the portion of the guide rod 406 passing through the end frame. The movable seat 402 is sleeved on the corresponding guide rod 406 through the guide cylinder provided thereon, thereby cooperating with the guide rod 406.

[0072] The track plate 105 defines its moving track by cooperating with the moving base 402. For example, the two can be in a rail-slider combination, that is, a slider is provided on the moving base 402 and a rail is provided on the track plate 105; or the two can be in a track-roller combination, that is, a track is provided on the track plate 105, and guide wheels that cooperate with the left and right sides of the track are provided on the moving base 402. However, as a preferred embodiment, in order to simplify the structure of the track plate, a track hole 107 is provided on the track plate, and a guide head extending into the track hole 107 is provided on the moving base 402. The movement track of the moving base 402 is defined as the inclined track by the cooperation between the track hole 107 and the guide head. On this basis, as a more preferred embodiment, the guide head is provided with a guide wheel 407, and the guide head cooperates with the track hole 107 through the guide wheel 407.

[0073] To reduce the front-to-back dimensions of the plug door drive device of the present invention, in a preferred embodiment, the power unit 305 is positioned above the lead screw 304 and is in transmission connection with one end of the lead screw 304. In this embodiment, the power unit 305 is a motor, but in other embodiments, the power unit 305 may also be a device such as a hydraulic motor capable of outputting rotational motion. The transmission between the power unit 305 and the corresponding ends of the lead screw 304 can be achieved through a gear mechanism, but in a preferred embodiment, to reduce noise and facilitate configuration, the power unit 305 and the lead screw 304 are connected by a synchronous belt 307.

[0074] In order to enable the power device 305 to be automatically turned off when the plug sliding door is fully closed, in a preferred embodiment, a limit switch 108 is provided on the connecting seat 1 to cooperate with the screw seat 301. The limit switch 108 is triggered by the screw seat 301 to turn off the power device 305 when the plug sliding door is fully closed. Figure 1 In the illustrated embodiment, the screw seat 301 can trigger the travel switch 108 via the rear module connecting rod 303. In other embodiments, the power device can be automatically shut down after the sliding door is fully closed by controlling the operating time of the power device. Alternatively, a torque sensor can be configured to detect lateral torque and shut down the power device when the torque suddenly increases, thereby achieving automatic shutdown of the power device after the sliding door is fully closed.

[0075] In order to be able to drive the upper and lower ends of the door panel 2 simultaneously when it tilts and resets relative to the vehicle body side, as a preferred embodiment, a door shaft 5 is provided at one end of the connecting seat 1 close to the swing end of the guide frame 401, and a crank arm 501 is provided on the door shaft 5. The structure of the door shaft 5 and how it drives the door panel 2 by forward and reverse rotation are prior arts in this field, which can be found in the patent specification of the applicant with the authorization announcement number CN218815877U, and will not be described in detail here. Different from the prior art, in the plug door driving device of the present invention, as Figure 1 、 Figure 3 As shown, the crank arm 501 forms a four-bar linkage by connecting the auxiliary rod 502 configured on the seat 1. The four-bar linkage is connected to the swing end of the guide frame 401 via a transmission rod 503. The swing end of the guide frame 401 swings to drive the door shaft 5 to rotate back and forth. Compared to the crank arm in the prior art where the corresponding slider is directly connected to the door shaft via a connecting rod, the present invention converts the crank arm 501 into a rod of the four-bar linkage by configuring the auxiliary rod 502. The door shaft can be driven by the shorter transmission rod 503, thereby saving a large amount of space near the upper end of the door shaft, preventing the connecting rod from interfering with the movable seat and affecting the movable seat's travel, thereby affecting the door opening, and also avoiding the need to lower the position of the connecting rod to avoid interference with the movable seat, thereby affecting the height space of the door. As a further preferred embodiment, the above-mentioned four-bar linkage can be configured as a parallelogram mechanism.

[0076] Considering that when encountering an emergency, the Sierra door should be able to be opened in an emergency. In a preferred embodiment, the screw 304 and the nut 306 are mutually active and passive components, that is, when the screw 304 rotates, the nut 306 can be driven to move axially, and when the nut 306 moves, the screw 304 can be driven to rotate. When the guide frame 401 swings to be parallel to the inclined track, the door panel 2 can be pushed open by manpower. In order to enable the guide frame 401 to swing from the position when the Sierra door is closed to a position parallel to the inclined track, an emergency unlocking device is also provided on the connecting seat 1. The emergency unlocking device includes an accumulator 6 fixed to the connecting seat 1 and a flexible shaft 7 connected to the accumulator 6. The other end of the flexible shaft is connected to the door carrying frame module or the power module. By releasing energy through the accumulator 6, the guide frame 401 can be pulled to a position parallel to the inclined track. The accumulator 6 uses a telescopic cylinder with a compression spring as the energy storage component. Its structure is not described here.

[0077] like Figure 1 、 2As shown in Figures 6 and 7, the accumulator 6 is connected to the pull wire 702 in the flexible shaft through a pull wire joint 701. The pull wire joint 701 can be composed of the cylinder rod of the telescopic cylinder or connected to the cylinder rod of the telescopic cylinder. In order to avoid the pull wire folding due to the speed of the pull wire being less than the reset speed of the pull wire 702 when the cylinder rod is reset, in a preferred embodiment, the pull wire joint 701 is set to a structure including a pull wire traction tube 703. The pull wire traction tube 703 and the end of the pull wire in the flexible shaft are matched in a one-way transmission in the direction of pulling the pull wire. When the accumulator 6 is triggered, the pull wire traction tube 703 is pulled and drives the pull wire to move synchronously. When the accumulator 6 is reset, the pull wire traction tube 703 can be reset first, and does not drive the pull wire 702 to move during the reset process, thereby avoiding the pull wire from being folded and damaged.

[0078] In order to ensure that the plug-in door is locked when closing, a locking link 8 for locking the plug-in door in the closed state is provided between the module link connected to the end of the screw seat 301 close to the swing end of the guide frame and the swing end of the guide frame 1. Figure 8-9 As shown, when receiving the door opening signal, the swinging end of the guide frame 401, that is, the rear end, will swing. This swinging process will enable the door panel 2 to adjust from a posture parallel to the vehicle body side to a posture inclined relative to the vehicle body side, and the rear end of the door panel 2 will swing out of the vehicle body side. During the swinging process, the rear module connecting rod 303 rotates clockwise, and the locking connecting rod 8 and the rear module connecting rod 303 swing through the collinear dead point position to a state where there is an angle between the two. When the above-mentioned swing makes the guide frame 401 parallel to the inclined trajectory, the door panel can move backward until it is fully opened. When closing, the power device 305 drives the screw 304 to rotate, and the nut 306 will move forward relative to the screw 304, and in turn drive the moving seat 402 and the door panel 2 to move forward until the moving seat 402 moves forward to a position where it cannot move. At this time, the screw 304 will move backward relative to the nut 306 and drive the screw seat 301 to move synchronously. During the movement of the screw seat 301, the module connecting rod will swing in the front and rear directions. The swing is transmitted to the moving seat 402 and the guide frame 401 through the nut 306 at the same time, so the guide frame 40 The swinging end of 1, that is, the rear end, will also swing. This swinging process will realize the adjustment of the door panel 2 from a posture inclined to the body side to a posture parallel to the body side, and the rear end of the door panel 2 will swing into the body side. During this process, the rear module connecting rod 303 swings counterclockwise until it is just past the collinear position with the locking connecting rod 8. This position is the over-dead point position. The locking connecting rod 8 can use the over-dead point principle of the connecting rod mechanism to realize the locking of the sliding door. Its specific structure and working principle can be found in the patent specification of the applicant's authorization announcement number CN218815816U, which will not be repeated here.

[0079] The specific embodiment of the sliding plug door of the present invention: The plug-in sliding door of the present invention includes a plug-in sliding door driving device and a door panel. Since the structure of the plug-in sliding door driving device has been described in detail above, it will not be repeated here.

[0080] Specific embodiments of the vehicle of the present invention: The vehicle of the present invention includes a body, and a Sierra door is installed on the side of the body. The Sierra door includes a Sierra door driving device and a door panel. Since the structure of the Sierra door driving device has been described in detail above, it will not be repeated here.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A plug-type sliding door driving device, comprising a connecting seat for connecting to a vehicle body, wherein a door panel driving mechanism is provided on the connecting seat, characterized in that: The door panel driving mechanism includes a door carrying frame module and a driving module. The door carrying frame module includes a guide frame hinged to the connecting seat at one end and capable of swinging in the left and right directions, and a movable seat installed on the guide frame. A track plate is also fixedly provided on the connecting seat to limit the moving trajectory of the movable seat to an inclined trajectory inclined left and right; the driving module includes a screw seat, the two ends of the screw seat are respectively connected to the connecting seat by module connecting rods to form an asymmetric quadrilateral, so that the movement of the screw seat relative to the connecting seat is a composite movement combining swinging in the left and right directions and translation in the front and back directions. A screw and its power device are installed on the screw seat, and a nut fixedly connected to the movable seat is installed on the screw; when the Sierra door is in the closed position, there is a set angle between the screw and the inclined trajectory so that the nut is locked, and the rotation of the screw can drive the screw seat to move. When it moves until the screw is parallel to the inclined trajectory, the nut can drive the movable seat to move.

2. The plug door driving device according to claim 1, characterized in that: The connecting seat is provided with a long strip limiting hole, the swing end of the guide frame is provided with a roller that cooperates with the long strip limiting hole, and the swing end of the guide frame cooperates with the connecting seat through the roller.

3. The plug door driving device according to claim 1, characterized in that: The guide frame and the connecting seat are hinged via a ball joint assembly.

4. The plug sliding door driving device according to any one of claims 1 to 3, characterized in that: The guide frame includes at least two parallel guide rods, adjacent ends of the guide rods are connected by end frames, and the guide frame is hinged to the connecting seat through the end frames at the corresponding ends.

5. The plug sliding door driving device according to any one of claims 1 to 3, characterized in that: The track plate is provided with a track hole, and the moving base is provided with a guide head extending into the track hole. The moving track of the moving base is limited to the inclined track through the cooperation between the track hole and the guide head.

6. The plug door driving device according to claim 5, characterized in that: The guide head is provided with a guide wheel, and the guide head is matched with the track hole through the guide wheel.

7. The plug sliding door driving device according to any one of claims 1 to 3, characterized in that: The power device is arranged above the lead screw and is transmission-connected to one end of the lead screw.

8. The plug door driving device according to claim 7, characterized in that: The power device and the lead screw are connected via a synchronous belt transmission.

9. The plug door driving device according to claim 1, characterized in that: A travel switch that cooperates with the screw seat is provided on the connecting seat. When the Sierra door is closed into place, the travel switch is triggered by the screw seat to shut down the power device.

10. The plug-sliding door driving device according to any one of claims 1 to 3, characterized in that: A door shaft is provided at one end of the connecting seat close to the swing end of the guide frame, and a crank arm is provided on the door shaft. The crank arm forms a four-bar linkage through an auxiliary rod arranged on the movable seat. The four-bar linkage is connected to the swing end of the guide frame through a transmission rod. The swing of the swing end of the guide frame can drive the door shaft to rotate reciprocatingly.

11. The plug door driving device according to claim 10, characterized in that: The four-bar linkage is a parallelogram mechanism.

12. The plug-sliding door driving device according to any one of claims 1 to 3, characterized in that: The lead screw and nut are active and passive parts to each other. An emergency unlocking device is also provided on the connecting seat. The emergency unlocking device includes an accumulator fixed to the connecting seat and a flexible shaft connected to the accumulator. The other end of the flexible shaft is connected to the power module of the door frame module, which is used to pull the guide frame to a position parallel to the inclined track.

13. The plug door driving device according to claim 12, characterized in that: The accumulator includes a wire pull joint, and the wire pull joint includes a wire pull tube. The wire pull tube and the end of the wire are matched with each other in a one-way transmission in the direction of pulling the wire.

14. The plug sliding door driving device according to any one of claims 1 to 3, characterized in that: A locking link for locking the Sierra door in a closed state is provided between the module link connected to one end of the screw seat close to the swing end of the guide frame and the swing end of the guide frame.

15. A sliding plug door comprising a drive device and a door panel connected to the drive device, characterized in that: The driving device is the sliding door driving device described in any one of claims 1-14.

16. A vehicle comprising a vehicle body and a sliding plug door mounted on the side of the vehicle body, characterized in that: The sliding plug door is the sliding plug door described in claim 15.

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